Exercise How To:
Back and Forth Lunges: Body Weight Only

Action: Keep your balance and lift one leg and lunge, or step out
in front of you. Make sure your back is straight up and down, Bend
your knees and lower your body to the ground. Your front knee should be
directly over your ankle and your back knee should only be a few inches
above the ground and you should be on your toes on the back foot.

Push off with the front foot and return to the starting position
without letting your foot or toes drag on the ground.

Extend the leg that you just used to perform a forward and perform
a backward lunge.

Using this same leg, keep your balance and extend your foot behind
you. The knee of your front leg should be directly over your ankle.
Your back knee should be a few inches above the ground. Only the
toes of your back foot should be touching the ground.